68638966 has 16 divisors (see below), whose sum is σ = 113902848. Its totient is φ = 30759400.

The previous prime is 68638957. The next prime is 68638981. The reversal of 68638966 is 66983686.

It is a happy number.

It is a super-2 number, since 2×68638966² = 9422615307098312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20410 + ... + 23533.

It is an arithmetic number, because the mean of its divisors is an integer number (7118928).

Almost surely, 2^68638966 is an apocalyptic number.

68638966 is a deficient number, since it is larger than the sum of its proper divisors (45263882).

68638966 is a wasteful number, since it uses less digits than its factorization.

68638966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44027.

The product of its digits is 2239488, while the sum is 52.

The square root of 68638966 is about 8284.8636681601. The cubic root of 68638966 is about 409.4399770295.

The spelling of 68638966 in words is "sixty-eight million, six hundred thirty-eight thousand, nine hundred sixty-six".